Help with inboard VP closed loop coolant system

[Nakoda boater]

Hey all,
Trying to finish up an engine install in our reborn Zeta. It’s a 1997 5.7 GI Volvo Penta and there s a hose that comes out of a reservoir under the low pressure pump near the rear of the engine and for the life of me and can’t remember or locate where it ties back into the closed system.
Thanks

 

[DuroBoat]

Hey all,
Trying to finish up an engine install in our reborn Zeta. It’s a 1997 5.7 GI Volvo Penta and there s a hose that comes out of a reservoir under the low pressure pump near the rear of the engine and for the life of me and can’t remember or locate where it ties back into the closed system.
Thanks

Is it an overflow hose? Ie: drains to the bilge

 

[Nakoda boater]

Is it an overflow hose? Ie: drains to the bilge

Hmm well, the line going into the reservoir is coming from the heat exchanger so it’s under pressure I think.

 

[ab1752]

Hey all,
Trying to finish up an engine install in our reborn Zeta. It’s a 1997 5.7 GI Volvo Penta and there s a hose that comes out of a reservoir under the low pressure pump near the rear of the engine and for the life of me and can’t remember or locate where it ties back into the closed system.
Thanks

Can you take a pic? Could it be for the ps cooler?

 

[ab1752]

Do you mean the low pressure fuel pump?

 

[Nakoda boater]

Can you take a pic? Could it be for the ps cooler?

The raw water goes directly to the ps cooler via 1 1/4” line.

 

[Nakoda boater]

Do you mean the low pressure fuel pump?

Yes the low pressure fuel pump, my bad

 

[ab1752]

K so my config is a 320gxi and while I've changed the fuel cell out which integrates both high and low pressure pumps I'm 99% sure that's cooled by the fuel itself. Agree with the above the ps is raw water cooled, so without a pic it's hard to say what this hose is all about. What were you doing to the engine that this was all apart? Also what reservoir is this connected too, could it be for a heat system? I can't think of any FWC / antifreeze lines that are transom side of the engine off hand.

 

[Fish-on]

if you talking about the small 1/4 hose that goes to the vapour chamber (fuel cell) it comes out of the heat exchanger at the bottom (raw water side) then connects to the vapor chamber to cool the fuel then exits the vapor chamber via another 1/4 hose which goes to the side of the exhaust riser and discharges with the rest of the raw water.

 

[Nakoda boater]

if you talking about the small 1/4 hose that goes to the vapour chamber (fuel cell) it comes out of the heat exchanger at the bottom (raw water side) then connects to the vapor chamber to cool the fuel then exits the vapor chamber via another 1/4 hose which goes to the side of the exhaust riser and discharges with the rest of the raw water.

Ok, thanks I’ll check it out when I get home and I thank all those who have replied!

 

[Nakoda boater]

So I had a look at the risers and being the Hi-Tek there is no extra ports besides the main raw water input.
Will give Deans marine a call tomorrow